Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4901
PUT
Caesarstone
CSTE
$69.5M
| $115K | ﹤0.01% |
20,200
-329,900
| -94% | -$2.46M |
|
4902
CALL
Castor Maritime
CTRM
$18.3M
| $115K | ﹤0.01% |
10,310
-9,380
| -48% | -$117K |
|
|
DMC
4903
CALL
Del Monte Corp
DMC
$1.42B
| $115K | ﹤0.01% |
4,400
-9,200
| -68% | -$242K |
|
4904
iShares Global Clean Energy ETF
ICLN
$2.22B
| $115K | ﹤0.01% |
5,809
+4,309
| +287% | +$84.7K |
|
4905
Companhia Siderúrgica Nacional
SID
$1.37B
| $115K | ﹤0.01% |
41,896
-142,967
| -77% | -$384K |
|
|
STR
4906
PUT
DELISTED
Sitio Royalties
STR
| $115K | ﹤0.01% |
4,000
+1,200
| +43% | +$34.7K |
|
4907
CALL
Adecoagro
AGRO
$1.4B
| $114K | ﹤0.01% |
13,800
+13,000
| +1,625% | +$106K |
|
4908
CALL
AdvanSix
ASIX
$542M
| $114K | ﹤0.01% |
+3,000
| New | +$112K |
|
4909
Burford Capital
BUR
$914M
| $114K | ﹤0.01% |
+14,055
| New | +$116K |
|
4910
CALL
Endava
DAVA
$165M
| $114K | ﹤0.01% |
1,500
-9,700
| -87% | -$721K |
|
4911
PUT
F5
FFIV
$22B
| $114K | ﹤0.01% |
800
-900
| -53% | -$132K |
|
|
GOOD
4912
CALL
Gladstone Commercial Corp
GOOD
$623M
| $114K | ﹤0.01% |
6,200
-14,600
| -70% | -$260K |
|
4913
Goldgroup Mining Inc.
GORO
$155M
| $114K | ﹤0.01% |
74,665
+20,892
| +39% | +$33.9K |
|
4914
Ingersoll Rand
IR
$33.1B
| $114K | ﹤0.01% |
2,189
-4,798
| -69% | -$245K |
|
4915
PUT
National Health Investors
NHI
$3.79B
| $114K | ﹤0.01% |
2,200
+600
| +38% | +$32.9K |
|
|
NVMI
4916
CALL
Nova
NVMI
$11.7B
| $114K | ﹤0.01% |
1,400
-30,900
| -96% | -$2.52M |
|
4917
CALL
Spero Therapeutics
SPRO
$68.9M
| $114K | ﹤0.01% |
66,000
+14,800
| +29% | +$27.6K |
|
4918
Vanguard Consumer Discretionary ETF
VCR
$5.97B
| $114K | ﹤0.01% |
+522
| New | +$122K |
|
4919
CALL
XPEL
XPEL
$1.22B
| $114K | ﹤0.01% |
1,900
-1,300
| -41% | -$83K |
|
|
ASTR
4920
CALL
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $114K | ﹤0.01% |
17,547
-780
| -4% | -$6.13K |
|
4921
PUT
AST SpaceMobile
ASTS
$15.8B
| $113K | ﹤0.01% |
23,500
+600
| +3% | +$3.62K |
|
4922
AeroVironment
AVAV
$7.19B
| $113K | ﹤0.01% |
1,330
-7,369
| -85% | -$630K |
|
4923
PUT
Blackstone Secured Lending
BXSL
$5.36B
| $113K | ﹤0.01% |
+5,100
| New | +$119K |
|
4924
CALL
Fennec Pharmaceuticals
FENC
$335M
| $113K | ﹤0.01% |
11,800
+900
| +8% | +$7.96K |
|
4925
PUT
G-III Apparel Group
GIII
$1.54B
| $113K | ﹤0.01% |
8,300
-2,700
| -25% | -$45.4K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.